GO FOLLOW ME ON TWITCH! 😠 www.twitch.tv/lowlevellearning

@SportSync_official

Жыл бұрын

Please do another tutorial on this stuff. It's really interesting.

@kkgt6591

Жыл бұрын

Can you please Zoom in on the code. It's not readable on mobile screen.

@orangehatmusic225

Жыл бұрын

100% disagree with your opening statement. The Rasberry pi is now impossible to buy. What should cost $50 is now selling for $190. All of you illegal rom downloading boi's who wanted emulation jacked up the prices. Way to go pirate. Way to ruin it for everyone else.

@kennethbeal

Жыл бұрын

@@orangehatmusic225 Lockdowns had *nothing* to do with it? Seems a little short-sighted there; chips of all types were affected, including the car my dad wanted to buy. Pirates STEAL ITEMS. Like Assange recently said, he didn't steal anything; he made a copy. Verbs matter. Ever hear "Possession is nine tenths of the law"? When people copy software, the original possessor does not lose their possession. It's more like lighting a candle from another candle. Separately, the esp32 is like $5, a 240x240 color screen is another $5, and PictoBlox is like MIT's Scratch, for the smaller devices. Or the Orange Pi, for $117. So: I 100% disagree with your 100% disagreement. :)

@UltimatePerfection

Ай бұрын

Rust really runs on everything, even on my local iron river bridge!

I knew literally nothing about embedded systems and barely anything about Rust 18 minutes ago, and now it feels like it's a very acheivable thing to learn thanks to this demonstration. You're clearly a gifted teacher, fantastic video.

@LowLevelLearning

Жыл бұрын

Welcome aboard!

@chillbro2275

6 ай бұрын

@@LowLevelLearning no pun intended :D haha

@niaei

3 ай бұрын

Now you can update your resume. :)

@ben_sch

2 ай бұрын

Same here. I have a background in web dev, but allost everything was new to me here. Yet, I‘ve understood pretty much everything and learned a ton. But honestly speaking, I will probably never learn this type of low-level programming. Just seems way too much effort to get something done when there are easier albeit less efficient tools/languages to use. Nice to be able to peek into this world though

The great thing about your videos is the pace and "constant" narration. It feels like there isn't a single second in the video where you're not explaining what you're currently doing. That makes it very easy to not lose focus and attention as a viewer

@LowLevelLearning

Жыл бұрын

Wow, thanks!

@matzeb.ausv.1380

Жыл бұрын

very true

@kylarosborne698

Жыл бұрын

@@LowLevelLearning I agree. You really talk about every detail which is so important. The viewer has no questions, and you make no assumptions about what the viewer knows. I hope to watch more like this in the future :D

Really like that you use documentation as a reference to explain. Lots of tutorials skip the fact that documentation is there to help.

@kennethbeal

Жыл бұрын

It's awesome that he does that, agreed! Just a few videos of this nature and we're downloading helicopter flight manuals between words of dialogue! :) (Matrix reference; as we age, our references get stale, like moldy bread one can use to cure disease or have interesting visions with.)

The amount of effort on this video to make it only 18 min is insane if you are a bit familiar with embedded system, thanks for it LLL

@LowLevelLearning

Жыл бұрын

Much appreciated!

So glad I found this channel, I have been writing code for a long time and wanted to jump into some low level stuff to improve my wider understanding esp. embedded systems etc. You cover fundamentals so well and easily digestible. Thanks for this!

I am absolutely watching your channel from now on.This is the most I have ever learned from a programming video. I've been trying to learn how to be a low level developer for years. Since high school. WOW. It's quick. It's on point. And I can follow it. I love how you just filled in several gaps learning in only a few minutes. I could have stayed in college, and I am not knocking anyone who does, but I have a short attention span. Thanks for this. Don't even remember how I stumbled here.

You can make a `build.rs` file like this ```rust fn main() { println!("cargo:rerun-if-changed=./linker.ld"); } ``` to hint to cargo that a change in that file should also result in a rebuild

@byronhambly

Жыл бұрын

Great suggestion, I think you also need to set that build script in the Cargo.toml mainfest of your crate

Such high quality content, thank you! Hoping in the future you can find the time to create a whole course on embedded Rust, I'd sign up in a heartbeat.

Thanks for Everything you do LLL, Seriously your videos have invigorated my spirit and inspired me to learn more about computer systems and lower level langs. C and Go are becoming my favorite languages to write my code. I'm gonna try writing some rust today!. Thanks again! Keep up the great work!

@LowLevelLearning

Жыл бұрын

Wow, thank you! I'm so happy to hear the videos inspire you :)

@BR-lx7py

Жыл бұрын

@@LowLevelLearning Haha, that's interesting because my takeaway was that low level programming is so different that I know less about it than I thought :). I could probably follow along, but I'm SOL the second something goes wrong.

With all the soft soft tutorials that exist on YT, yours just created that "light bulb illumination" mont in my head. Thanks for taking the

13:39 I would hope nobody would be mad. Unsafe code is basically the only way this can be done. It's just a fact. There's a reason rust has the unsafe keyword, because it's sometimes needed. :) Also, thanks for the video. It's very enlightening!

@devrim-oguz

3 ай бұрын

It is just same as writing C inside rust with more wording of course.

@TheSast

3 ай бұрын

​@@devrim-oguz unsafe rust is not C

@Gramini

2 ай бұрын

Could probably be abstracted into a safe interface (or however it's called). Like a struct (with the PIN number) with methods or even plain functions (one for turning a hard-coded PIN on and the other for turning it off). But in the end the unsafe has be be somewhere.

@tsclly2377

2 ай бұрын

Safe code is slower code, as there has to be a lot of hash inserts and checks and when you are processing movement, electrical spikes and wave forms, a lot of interrupts that are happening in the higher kilohertz range, such as signal processing, your program isn't gong to be looking at the web directly and should reject anything unexpected.

@TheSast

2 ай бұрын

@@tsclly2377 safe code is not slower than unsafe code

Thanks man, it took some adjustments to make it run in u-boot on a cortex-a9, but I figured it out eventually. Very helpful tutorial.

You should configure the internal timers to trigger an interrupt every millisecond to increment a counter. Then reference that counter to to get more precise timing on when the LEDs turn on and off.

Absolutely killing it with how you're presenting. I'm not really a fan of Rust but I couldn't stop watching.

Excellent vid man. Been a while since I've done any embedded programming. Very cool seeing how to do this low-level stuff on a pi 😎👍

as a recovering TS dev I'm watching this in complete awe! Thanks for explaining what you're doing, it leaves me with hope ;)

I really like how you explain not only how to do things, but how to look for things yourself (e.g. the broadcom datasheet or the rpi firmware). I already have a bit of experience in embedded programming but I'm sure this helps beginners a lot. And more importantly, it makes the whole field feel less magic and scary than just saying "this address controls this LED because I know it".

The panic handler function is for Rust panics. Not hardware faults. And #[panic_handler] is not called an option, it's called an attribute.

@marcuskissinger3842

Ай бұрын

Calm down buddy

@ChefKissInc

Ай бұрын

@@marcuskissinger3842 Not sure where the impression I wasn't calm when writing that came from, I just have a neutral tone.

@marcuskissinger3842

Ай бұрын

@@ChefKissInc yeah but just relax

Thanks!

@LowLevelLearning

Жыл бұрын

MARK! My guy. Thank you so much for this generous Super Thanks. I hope this video helped you in your embedded development journey.

I started working on an operating system in rust. I never went that far with it but it works. Can boot both legacy bios mode and modern efi style. Though only in qemu on efi. Don’t have video output properly working on any real efi hardware I have. But with bios boot it works with a text mode console. Boots into long mode and all but no memory protection

Superb quality by all means. Instant subscribe without a moment of hesitation.

Fantastic video, very very informative. Hope to see more content on RUST for embedded systems from Low Level Learning

@LowLevelLearning

Жыл бұрын

More to come!

Wow seeing arm assembler at the end there really took me back to my assembler days of programming the first acorn risc machines…

this is incredible, thanks for sharing this knowledge

thankyou. someone who shows the meat of a topic, no fluff and just the right amount of fat. great contribution. cheers.

I just found the channel and I loved the video. One thing that it makes me thing was: if is it possible to build a kernel with Rust, then running appa on top of it would be possible too. The possibilities to embed are endless

Very nice and well explained. Every tNice tutorialng is crystal clear and easily understandable.

Amazing content! Congrats dude!

the absolute best programming video I've seen in years

I just started watching your videos yesterday and in every one you've had full facial hair, the beanie and glasses. Then this one autoplays and I'm like "wait...is this the same guy?" you look so different without all of those "modifiers" haha

Fantastic video! Really wish they covered this in my software engineering degree. No time to learn like the present!

Nice. Finally no more annoying unavoidable Linux boot log messages in a console. Just a pure code and an awesome blinking ;)

Good video thank you , updated visual studio and everything worked. I'm really glad I found a working crack

Excellent tutorial and information. Thank you for sharing. Just gained a new subscriber! Thanks again!

@LowLevelLearning

Жыл бұрын

Thanks for the sub!

@DCODev

Жыл бұрын

@@LowLevelLearning my pleasure!

Me as a web developer trying to learn more low level programming during most of this, "Funny words magic man." But really great video, and has helped me a ton.

Would love more videos on baremetal kernel programming in rust. Maybe stepping slightly into OS programming ?

Great video but can you please increase the font size of visual studio code? It's hard to read code. Thanks.

@LowLevelLearning

Жыл бұрын

Yeah I'm sorry I realized this after I uploaded. I edit on a 4K monitor, didn't realize it was so small on YT.

This was really interesting. It would be great to see 2 things: 1) A list of references of sources you read to understand each part of this problem including the tools to generate the image that was capable of being loaded into the PI. i.e. a learning path. 2) An approach where you halted the processor putting it into a low power mode until the hardware timer triggered an interrupt allowing you to advance the state of the LED. The spinning for a delay makes this a bad start outside of proving that something could be done.

This is reallz interesting. What are your plans on next courses for your platform? Will the current mini course get updates and more content?

@LowLevelLearning

Жыл бұрын

Current mini course will probably stay in its current state while I work on the full AVR course. Thanks for watching!

Great video 10/10 clear and interesting

Love your stuff! Big help!

Awesome video! I always assumed it would be extremely difficult to get Rust running on bare metal, but this makes it seem pretty easy (I bet it took you a while to figure all of this out though, so thanks for the great tutorial). One question though: how would one integrate some sort of a filesystem into this? Say I want to store files on the RasPi and access them from within Rust. Is this possible (maybe by partitioning the storage device beforehand...)?

Amazing content, thank you!

@LowLevelLearning

Жыл бұрын

My pleasure!

WOW!!!! This video is very helpful!!

Very interesting, thanks! The Pi is already very beefy to learn embedded programming, at least it makes it very comfortable. Anyway, I'm wondering if they'll even be able to produce the 3 model again, I'm not optimistic. It would be a shame, so much fun things to do with it.

love the video,this is what i want to try with rust! can we get more bare metal like this on another device? arduino maybe? thank you

this was soooo useful, thanks

Thank you for the well made video! Which command can I use on windows to extract the binary from the elf file? I use the Visual Studio C++ Build Tools.

I wish RPi 4s were $35 once again...

@LowLevelLearning

Жыл бұрын

Same :(

I would love to see you setup and use Rust within an STMCube or MPLABX IDE development environment. Also curious if those IDE's could support ICD with Rust. I could use Rust professionally if I knew how to do that.

this is very cool. embedded programming is very interesting but so far i didn't dare to try it yet

I have grasped many info from explanation. Some of them were completely new to me. I'll appreciate if you were able to zoom just to the area where lines of code are written, specially the IDE. Thanks,,

Hohoho... there are so many things I like about this video. If this is anything to go by, I'm gonna make time and binge watch tf out of this channel.

@LowLevelLearning

Жыл бұрын

Welcome!

Amazing content dude!

@LowLevelLearning

Жыл бұрын

Glad you liked it

The CPU must be running very slow for us to see that LED blink that slowly. 50000 nop operations is nothing for a modern CPU, and we shouldn’t be able to see the LED normally if it ran at the full speed.

Interesting info! Though I'm not sure how this qualifies as a custom kennel?

Great Video, I wrote a Synth app in C#, I started coding it on a Microcontroller, but had to move it to my PC for speed etc.etc. Now I want to implement it on a Raspberry Pi. What would you recommend?

You are a living god among n, a legend worthy of praise. What you've uploaded here, will echo into eternity!

Unironically an actually good rust tutorial in general lmao

Never in my life i haven’t seen so unexpected transition, “let’s blink LED with your own kernel”

Thanks for such a great introduction! My one question is just about the naming? Is _start convention or arbitrary? Should the entrypoint always be prefixed by an underscore? Is the name main forbidden?

@LowLevelLearning

Жыл бұрын

_start is the Linux convention for the entry point to a binary. Not a requirement to call it that, although some compilers expect it

Thank you so much for this video - that’s really cool! I have done something similar in C++ but to see this in Rust is awesome! A follow up question if that’s okay please: let’s say you wanted to write a Rust application to run on Linux on a RPi 3B, what would you prefer: using the /dev/gpio* interface, or actually tweaking memory mapped addresses? What does the Rust code look like there: obviously you don’t need to bother with no_main right? Would love to see an example - if you or anyone has done it please.

Hey! Awesome video. As a viewer, I'd like to suggest increasing the font size (zooming the UI) to be clearer to read in small screens. Furthermore, as a concept in video making, it's better to avoid non-flat color elements like your transparent/medium opacity terminal. The video encoder has to sacrifice quality in texts (code) to embrace all details on screen (the diverse details in your wallpaper)

@LowLevelLearning

Жыл бұрын

I realized after I rendered and uploaded that the font quality wasn't great :(. I'm transitioning my videos to 4K in the future to avoid this. Thanks for watching!

@AbelShields

Жыл бұрын

Actually, if its static then it doesn't detract any quality at all - Tom Scott did a great video about video quality, bit rate, and moving vs stationary details.

@Aurora12488

Жыл бұрын

​@@AbelShields Agreed, translucency is perfectly fine when static, which in this case 99.999% of the time it is; potentially even more 9s when considering the video is 60fps and the proportion of the screen that updates is quite small. The encoder/decoder will *absolutely not choke* on this sort of content. To the video encoder, there is no difference here between a terminal with a translucent background, and a terminal with an opaque, washed out background image. Translucency only matters due to the complexity of attempting to compress something that is changing in extremely unpredictable ways, which translucent objects overlapping and moving on top of a moving background tend to cause. I really like the flair the translucent terminal gives; please don't change it​ @Low Level Learning ! Though of course, please go to 4K to make the text nice and crisp :)

@becelli

Жыл бұрын

You were right guys. I forgot about it. Thanks for the correction!

Impressive! BTW, Ada RTOS has always been able to do this if you can get it all supported.

Can you increase the font size in vscode? Its pretty hard to read. The font size in the terminal is very good

I didn’t know where to ask, so I figured I’d try in a KZread comment. Do you think you could do a video on various career paths that can be taken as a low level programmer? I have tons of experience doing high level things, but I’m considering a career shift.

I don't do rust, but still super useful information. I just got a pico W to do bare metal programming (and learning "properly" ARM assembly at the same time). next step is using a hardware timer instead of a loop?

@LowLevelLearning

Жыл бұрын

Hardware timer/interrupt would be a good alternative way to do this. Good luck with your Pico W! I'm still waiting on mine :(

Using `global_asm` to change the link section of a function is not supported (since top-level items may be reordered arbitrarily, so it might not apply to what you want it to. The intended way to change the section a function is in is with the link_section attribute, e.g. #[link_section = ".text._start"] pub extern "C" fn _start() { loop {} }

Heyyy would cross compiling through cross-rs also work? In my experience at least for cross compiling from windows to linux distros it is way easier to use cross

That's what we did on the university, but I was never good enough to actually get a job in embedded, so I just write Python stuff... Good luck to anyone pursuing this as a career choice. This is however a great hobby and great for home automation, maybe starting your startup...

Wait a minute, how did you figure out how many nop's you needed? Really good work, totally earned my subscription!

@Gramini

2 ай бұрын

It's just an arbitrary amount. NOP = no operation, which is used to make the program sleep. If it's blinking too fast, make it more. If it's too slow, reduce the number.

I have no idea what I just watched but I enjoyed it

I was surprised how understandable tNice tutorials tutorial is, thanks!

How do you learn this information starting at 2:14? This just feels like some sort of esoteric knowledge that one has to dig really deep to find. Not at all intuitive. But then again maybe I feel like this because of my limited knowledge of computer hardware.

Awesome video ! Thank you for spending the time to produce them for us ✨ slightly off topic question, say I want to compile for a Linux server, how may I configure the cargo target ?

nice setup btw

Thanks for the fantastic tutorial! Could you show a good example of controlling GPIO without "unsafe"?

@jovianarsenic6893

Жыл бұрын

I don’t think you can, since you’re writing to uninitialised memory addresses, a massive safe rust nono

@edgeeffect

Жыл бұрын

@@jovianarsenic6893 I'm pretty sure they do it in a safe way in some of the STM32 crates.... but I could be mistaken.

@Grstearns

Жыл бұрын

While not totally unsafe, but definitely more safe, you should wrap only the unsafe parts of the code. Have small subroutines that are entirely unsafe and call them from safe code. Pin-enable, pin-on, and pin-off (maybe the no-op if that requires unsafe as well) should all be their own functions that get called by the main loop which would realistically also be calling some kind of computational code that you definitely want to be checked

@rory_o

Жыл бұрын

I was wondering this myself. There must be a way without using unsafe blocks. I know they’re trying to use rust in the Linux kernel, and kernel device work is almost all about writing bits to raw pointers. Surely rust in the kernel isn’t just all unsafe blocks.

@DocWilco

Жыл бұрын

​@@Grstearns this is exactly how you're supposed to do unsafe code. Make it as small as possible so that it's easy to read and verify (by humans) that it does only the thing it's supposed to do.

screen in the top left, look at where it says program and click on where it says “aggressive te” and change it to “analog app 1 te”

If set 0 pulls it low, does clear pull it high? If so, then why is there also a set 1? Thanks for the great video!

nice content. thanks

would be cool to see you do some embedded nim

If I'm not mistaken, your project uses only a single core on the Rpi 3. The BCM2837 processor has 4 cores. Is there a RUST HAL crate that facilitates usage of the all cores in parallel?

Great one!

My wife has said that I'm mad, but I assure you that I am not! Great video, thank you!

Any thoughts on the article by bunnie, Rust: A Critical Retrospective?

Niceee what's the software used for the illustration at 0:45, I'd love to try it out

Would be cool if you explained how you came up with the number 50000 (like a word about the built-in clock).

@gardendado1999

Жыл бұрын

It's an incremental counter, imagine a for loop that does nothing but counts i from 0 to 50000 then exits, basically every timer is built like that, to count time you need a frequency clock to time ratio if you want to count seconds precisely.

Wow, am impressed

this was so cool

It seems like Rust is really gaining momentum at the moment. I've switched from learning web dev with JavaScript to focusing now solely on Rust, not for any particular field, I just want to really get to grips with Rust. I'm taking a gamble but it feels like a really good investment.

I was wondering what I was going to do with my three day weekend :)

@LowLevelLearning

Жыл бұрын

Not a bad way to spend your time!

Thank you!

It works, alright... but you're missing important step: setting stack pointer which only works for me in assembler.

Can you do a video about netwide assembler?

This is insane. I can't believe it didn't take _that_ much work to make this work in Rust

@chillbro2275

6 ай бұрын

The most work comes in figuring out what you need to do. Scouring documentation, and elsewhere for the key information is an absolute pain.

You should honestly start a udemy or something alike. You're a natural teacher!

It looks really hard to do low level programming. Huge respect for those who do.

what distro are you using?

Hey! I'm trying to call Rust Functions from C environment using the static library generation in Rust for the Cortex-M0+ target which is thumbv6m-none-eabi in Rust...The Linker in the C environment always throws some missing sections error like "section .ARM.exidx.text._start isn't included by the sections map". When i add this section..it throws more and more sections continuously. Appreciate any help